Crown foliage dynamics of mangrove <Emphasis Type="Italic">Kandelia obovata</Emphasis> in Manko Wetland,Okinawa Island,Japan |
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| Authors: | Kangkuso Analuddin Sahadev Sharma Rempei Suwa Akio Hagihara |
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| Institution: | (1) Graduate School of Engineering and Science, University of the Ryukyus, Okinawa 903-0213, Japan;(2) Faculty of Science, University of the Ryukyus, Okinawa 903-0213, Japan |
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| Abstract: | The crown foliage dynamics of Kandelia obovata (S., L.) Yong were investigated, including leaf recruitment, survival and leaf growth. Newly flushed leaves occurred successively
throughout the year, with a maximum in July and a minimum in January. The highest leaf death was in August, whereas it was
the lowest in January. The relative mortality rate of leaves seemed to depend on the season when new leaves flushed. The growth
pattern of leaves varied among seasons. The maximum leaf area was significantly larger in winter than in autumn, but showed
no significant difference between the winter and the other seasons. The half-expansion period and the intrinsic rate of increase
were respectively longer and lower in winter than in the other seasons. Therefore, leaves flushed in summer grew faster in
their initial stage and attained their maximum leaf area sooner than those flushed in winter. This most likely results from
the difference in temperature between summer and winter. The crown leaf area was almost stable throughout the year, as if
homeostatic control is likely to function. Stipule litterfall decreased significantly with increasing flower and propagule
litterfalls, indicating that a high production of flowers and propagules results in low leaf recruitment. This may be because
flower production and propagule growth impose a severe burden on K. obovata. |
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| Keywords: | Crown leaf area Kandelia obovata leaf area growth leaf recruitment leaf survival litterfall |
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